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leetcode-linghu-templete

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算法面试必备，推荐刷题网站www.lintcode.com。北大学霸的《LeetCode刷题模板》+V领取: jiuzhangfeifei

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# 北大令狐冲的LeetCode算法小抄Cheatsheet
首先自报家门，高中开始刷题，算法竞赛保送北大计算机学院，本硕连读毕业后，拿到网易、人人网、阿里、FB等公司offer，最终选择赴美国硅谷参加工作。到现在为止，刷过的算法题已超过**3000道**。

废话不多说，直接上干货。祭出我爆肝3个月、增删16次的[《面试常考算法模板Cheatsheet》](https://github.com/ninechapter-algorithm/leetcode-linghu-templete/tree/master/%E4%BB%A4%E7%8B%90%E8%80%81%E5%B8%88%E7%9A%84%E7%AE%97%E6%B3%95%E5%B0%8F%E6%8A%84)，在本仓库第二个文档直接下载。

这套《面试常考算法模板cheatsheet》，代码量不算少，案例也算不上牛逼，但绝对经典，绝对通用！像是二分、双指针、排序算法、二叉树、宽度优先搜索、深度优先搜索的使用条件、时间复杂度、代码模板，我也都整理好了。

## 面试常考算法模板Cheatsheet的用法

为了让大家能在我的Github得到尽可能多的帮助，这里献上使用方法：

1、**先给本仓库点个star**，再背我总结的算法模板（模板都不想花时间背，就别继续看了）

2、跟着下面目录中的的高频题练习（拿着模板练，一定要学会消化知识，这样才能举一反三）

3、最后在[LintCode](https://www.lintcode.com/problem/?utm_source=sc-gihub-jw)找**大厂高频ladder**进行练习（别bb，拿着模板多刷题一定没错）
 
## 我迭代了8年的算法学习课程-《九章算法班》

2014年我到美国Facebook工作。在硅谷，我发现华人的求职压力特别大，面对很多来自白人、印度人的竞争。为了帮助更多的人能通过Google，Facebook，Ticktok等公司的算法面试，我总结了我10多年来的刷题经验，录制了一套只有9个章节、18小时的[《九章算法班》](https://www.jiuzhang.com/course/71/?utm_source=sc-github-jw)。如今8年过去了，这套课程已经迭代到了50个章节、100多小时，也有数十万的程序员学习过我的这套课程，并找到了年薪百万的工作。

这套[《九章算法班》](https://www.jiuzhang.com/course/71/?utm_source=sc-github-jw)是收费的，但我也可以先看看我总结的免费的B站算法学习视频[《1个月刷爆LeetCode》](https://link.zhihu.com/?target=https%3A//www.bilibili.com/video/BV1i64y1u7Me/)

![](https://raw.githubusercontent.com/ninechapter-algorithm/leetcode-linghu-templete/master/pictures/20220908-153017.jpeg)
## 目录

- ### **令狐老师的算法小抄**
>[面试常考算法模板](https://github.com/ninechapter-algorithm/linghu-algorithm-templete/blob/master/%E4%BB%A4%E7%8B%90%E8%80%81%E5%B8%88%E7%9A%84%E7%AE%97%E6%B3%95%E5%B0%8F%E6%8A%84/%E9%9D%A2%E8%AF%95%E5%B8%B8%E8%80%83%E7%AE%97%E6%B3%95%E6%A8%A1%E6%9D%BF%20Cheat%20Sheet%20V4.3.pdf)

>[北大学霸的算法刷题笔记](https://github.com/ninechapter-algorithm/linghu-algorithm-templete/blob/master/%E5%8C%97%E5%A4%A7%E5%AD%A6%E9%9C%B8%E7%9A%84%E7%AE%97%E6%B3%95%E5%88%B7%E9%A2%98%E7%AC%94%E8%AE%B0.pdf)

- ### **数据结构**

>[二叉树搜索](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/%E2%BC%86%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91)

>[二叉树分治](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/%E4%BA%8C%E5%8F%89%E6%A0%91%E5%88%86%E6%B2%BB)

>[哈希表](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/%E5%93%88%E5%B8%8C%E8%A1%A8)

>[堆](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/%E5%A0%86)

>[字典树](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/%E5%AD%97%E5%85%B8%E6%A0%91)

>[栈](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/%E6%A0%88)

>[链表](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/%E9%93%BE%E8%A1%A8)

>[线段树知识点总结](https://github.com/ninechapter-algorithm/ninechapter-algorithm/blob/master/%E7%AE%97%E6%B3%95%E4%B8%8E%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/%E7%BA%BF%E6%AE%B5%E6%A0%91%E7%9F%A5%E8%AF%86%E7%82%B9%E6%80%BB%E7%BB%93.md)

- ### **算法思维**
>[新手编程必刷50题](https://github.com/ninechapter-algorithm/linghu-algorithm-templete/blob/master/%E7%BC%96%E7%A8%8B%E6%96%B0%E6%89%8B%E5%BF%85%E5%88%B750%E9%A2%98%20V1.0.docx)

>[二分法](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E7%AE%97%E6%B3%95%E6%80%9D%E7%BB%B4%E9%A2%98/%E4%BA%8C%E5%88%86%E6%B3%95)

>[位运算](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E7%AE%97%E6%B3%95%E6%80%9D%E7%BB%B4%E9%A2%98/%E4%BD%8D%E8%BF%90%E7%AE%97)

>[分治法](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E7%AE%97%E6%B3%95%E6%80%9D%E7%BB%B4%E9%A2%98/%E5%88%86%E6%B2%BB%E6%B3%95)

>[双指针](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E7%AE%97%E6%B3%95%E6%80%9D%E7%BB%B4%E9%A2%98/%E5%8F%8C%E6%8C%87%E9%92%88)

>[字典MAP](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E7%AE%97%E6%B3%95%E6%80%9D%E7%BB%B4%E9%A2%98/%E5%AD%97%E5%85%B8MAP)

>[并查集](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E7%AE%97%E6%B3%95%E6%80%9D%E7%BB%B4%E9%A2%98/%E5%B9%B6%E6%9F%A5%E9%9B%86)

>[排序算法](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E7%AE%97%E6%B3%95%E6%80%9D%E7%BB%B4%E9%A2%98/%E6%8E%92%E5%BA%8F%E7%AE%97%E6%B3%95)

>[贪心算法](https://github.com/ninechapter-algorithm/ninechapter-algorithm/tree/master/%E7%AE%97%E6%B3%95%E6%80%9D%E7%BB%B4%E9%A2%98/%E8%B4%AA%E5%BF%83%E7%AE%97%E6%B3%95)

- ### **动态规划**

>[动态规划十问十答](https://github.com/ninechapter-algorithm/ninechapter-algorithm/blob/master/%E7%AE%97%E6%B3%95%E4%B8%8E%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92%E5%8D%81%E9%97%AE%E5%8D%81%E7%AD%94.md)

- ### **系统设计**

>[如何答好面试中的系统设计题](https://github.com/ninechapter-algorithm/ninechapter-algorithm/blob/master/%E7%B3%BB%E7%BB%9F%E8%AE%BE%E8%AE%A1%20Syestem%20Design/%E5%A6%82%E4%BD%95%E7%AD%94%E5%A5%BD%E9%9D%A2%E8%AF%95%E4%B8%AD%E7%9A%84%E7%B3%BB%E7%BB%9F%E8%AE%BE%E8%AE%A1%E9%A2%98.md)

- ### **图论**
>[宽度优先搜索](https://github.com/ninechapter-algorithm/linghu-algorithm-templete/tree/master/%E5%9B%BE%E8%AE%BA/%E5%AE%BD%E5%BA%A6%E4%BC%98%E5%85%88%E6%90%9C%E7%B4%A2)

>[深度优先搜索](https://github.com/ninechapter-algorithm/linghu-algorithm-templete/tree/master/%E5%9B%BE%E8%AE%BA/%E6%B7%B1%E5%BA%A6%E4%BC%98%E5%85%88%E6%90%9C%E7%B4%A2)

- ### **FANNG面试高频题**
）
>[算法面试必刷100题](https://github.com/ninechapter-algorithm/linghu-algorithm-templete/blob/master/%E9%AB%98%E9%A2%91/%E7%AE%97%E6%B3%95%E9%9D%A2%E8%AF%95%E5%BF%85%E5%88%B7100%E9%A2%98.xlsx)

>[数组题](https://github.com/ninechapter-algorithm/linghu-algorithm-templete/tree/master/%E9%AB%98%E9%A2%91/%E6%95%B0%E7%BB%84%E9%A2%98)

>[Google 面试题 | 原子计数](https://github.com/ninechapter-algorithm/ninechapter-algorithm/blob/master/%E7%AE%97%E6%B3%95%E9%9D%A2%E8%AF%95%E9%A2%98%E8%A7%A3/Google%20%E9%9D%A2%E8%AF%95%E9%A2%98%20%7C%20%E5%8E%9F%E5%AD%90%E8%AE%A1%E6%95%B0.md)

>[Google 面试题 | 3个非重复子数组最大和](https://github.com/ninechapter-algorithm/ninechapter-algorithm/blob/master/%E7%AE%97%E6%B3%95%E9%9D%A2%E8%AF%95%E9%A2%98%E8%A7%A3/Google%20%E9%9D%A2%E8%AF%95%E9%A2%98%20%7C%203%E4%B8%AA%E9%9D%9E%E9%87%8D%E5%A4%8D%E5%AD%90%E6%95%B0%E7%BB%84%E6%9C%80%E5%A4%A7%E5%92%8C.md)

>[Google 面试题 | 字典里面的最长单词](https://github.com/ninechapter-algorithm/ninechapter-algorithm/blob/master/%E7%AE%97%E6%B3%95%E9%9D%A2%E8%AF%95%E9%A2%98%E8%A7%A3/Google%20%E9%9D%A2%E8%AF%95%E9%A2%98%20%7C%20%E5%AD%97%E5%85%B8%E9%87%8C%E9%9D%A2%E7%9A%84%E6%9C%80%E9%95%BF%E5%8D%95%E8%AF%8D.md)

>[Google 面试题 | 找二叉树最底层最左边的节点](https://github.com/ninechapter-algorithm/ninechapter-algorithm/blob/master/%E7%AE%97%E6%B3%95%E9%9D%A2%E8%AF%95%E9%A2%98%E8%A7%A3/Google%20%E9%9D%A2%E8%AF%95%E9%A2%98%20%7C%20%E6%89%BE%E4%BA%8C%E5%8F%89%E6%A0%91%E6%9C%80%E5%BA%95%E5%B1%82%E6%9C%80%E5%B7%A6%E8%BE%B9%E7%9A%84%E8%8A%82%E7%82%B9.md)

>[Google 面试题 | 合法的IP的地址](https://github.com/ninechapter-algorithm/ninechapter-algorithm/blob/master/%E7%AE%97%E6%B3%95%E9%9D%A2%E8%AF%95%E9%A2%98%E8%A7%A3/Google%20%E9%9D%A2%E8%AF%95%E9%A2%98%20%7C%20%E5%90%88%E6%B3%95%E7%9A%84IP%E7%9A%84%E5%9C%B0%E5%9D%80.md)

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